A storage apparatus includes: a flash memory that provides a storage area; a controller that controls writing and reading of data to and from the storage area; and a buffer memory that temporarily stores data to be written in the storage area, in which the controller selects one compression method from a first reversible compression method and a second reversible compression method based on access performance to the flash memory, and determines to compress data based on the selected one compression method and to write the compressed data to the storage area, and the first reversible compression method has a lower compression ratio and a slower compression speed than the second reversible compression method.
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5. The storage apparatus according to claim 4, wherein the controller determines whether or not an average speed at which data stored in the storage area is read is faster than or equal to a predetermined target read speed, and determines whether or not to execute the compression method change based on a determination result.
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November 8, 2016
October 25, 2022
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